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Expenses by Nature | 12 Months Ended
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Dec. 31, 2020
Analysis of income and expense [abstract] |
Expenses by Nature | Expenses by Nature Expenses classified by nature are as follows:
Year ended Dec. 31 | 2020 | 2019 | 2018
| Fuel, carbon compliance and purchased power | Operations, maintenance and administration | Fuel, carbon compliance and purchased power | Operations, maintenance and administration | Fuel, carbon compliance and purchased power | Operations, maintenance and administration
Fuel and carbon compliance | 574 |  | — |  | 669 |  | — |  | 656 |  | — |
Coal inventory writedown (Note 17) | 37 |  | — |  | — |  | — |  | — |  | — |
Purchased power | 163 |  | — |  | 246 |  | — |  | 210 |  | — |
Mine depreciation | 144 |  | — |  | 119 |  | — |  | 136 |  | — |
Salaries and benefits | 50 |  | 235 |  | 52 |  | 228 |  | 98 |  | 245 |
Other operating expenses | — |  | 237 |  | — |  | 247 |  | — |  | 270 |
Total | 968 |  | 472 |  | 1,086 |  | 475 |  | 1,100 |  | 515 |

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- Definition The disclosure of expenses by nature. [Refer: Expenses, by nature] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_10_e&doctype=Standard -URIDate 2019-03-27 + Details
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